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  • Articles and reports: 13-604-M2009063
    Description:

    This paper highlights the Canadian Tourism Satellite Account (CTSA) developed by Statistics Canada. The CTSA provides an economic measure of the importance of tourism in terms of expenditures, Gross Domestic Product and employment for Canada. It permits a comparison of tourism with other industries within Canada since the concepts and methods used are based on the framework of the Canadian System of National Accounts. The study revealed that tourism is an important part of Canada's well diversified economy. This paper presents the results of the CTSA for reference year 2004.

    This study was prepared by staff of the Research and Development Projects and Analysis Section, Income and Expenditure Accounts Division, Statistics Canada. The study was funded by the Canadian Tourism Commission.

    Release date: 2009-12-24

  • Articles and reports: 12-001-X200900211036
    Description:

    Surveys are frequently required to produce estimates for subpopulations, sometimes for a single subpopulation and sometimes for several subpopulations in addition to the total population. When membership of a rare subpopulation (or domain) can be determined from the sampling frame, selecting the required domain sample size is relatively straightforward. In this case the main issue is the extent of oversampling to employ when survey estimates are required for several domains and for the total population. Sampling and oversampling rare domains whose members cannot be identified in advance present a major challenge. A variety of methods has been used in this situation. In addition to large-scale screening, these methods include disproportionate stratified sampling, two-phase sampling, the use of multiple frames, multiplicity sampling, panel surveys, and the use of multi-purpose surveys. This paper illustrates the application of these methods in a range of social surveys.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211037
    Description:

    Randomized response strategies, which have originally been developed as statistical methods to reduce nonresponse as well as untruthful answering, can also be applied in the field of statistical disclosure control for public use microdata files. In this paper a standardization of randomized response techniques for the estimation of proportions of identifying or sensitive attributes is presented. The statistical properties of the standardized estimator are derived for general probability sampling. In order to analyse the effect of different choices of the method's implicit "design parameters" on the performance of the estimator we have to include measures of privacy protection in our considerations. These yield variance-optimum design parameters given a certain level of privacy protection. To this end the variables have to be classified into different categories of sensitivity. A real-data example applies the technique in a survey on academic cheating behaviour.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211038
    Description:

    We examine overcoming the overestimation in using generalized weight share method (GWSM) caused by link nonresponse in indirect sampling. A few adjustment methods incorporating link nonresponse in using GWSM have been constructed for situations both with and without the availability of auxiliary variables. A simulation study on a longitudinal survey is presented using some of the adjustment methods we recommend. The simulation results show that these adjusted GWSMs perform well in reducing both estimation bias and variance. The advancement in bias reduction is significant.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211039
    Description:

    Propensity weighting is a procedure to adjust for unit nonresponse in surveys. A form of implementing this procedure consists of dividing the sampling weights by estimates of the probabilities that the sampled units respond to the survey. Typically, these estimates are obtained by fitting parametric models, such as logistic regression. The resulting adjusted estimators may become biased when the specified parametric models are incorrect. To avoid misspecifying such a model, we consider nonparametric estimation of the response probabilities by local polynomial regression. We study the asymptotic properties of the resulting estimator under quasi-randomization. The practical behavior of the proposed nonresponse adjustment approach is evaluated on NHANES data.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211040
    Description:

    In this paper a multivariate structural time series model is described that accounts for the panel design of the Dutch Labour Force Survey and is applied to estimate monthly unemployment rates. Compared to the generalized regression estimator, this approach results in a substantial increase of the accuracy due to a reduction of the standard error and the explicit modelling of the bias between the subsequent waves.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211041
    Description:

    Estimation of small area (or domain) compositions may suffer from informative missing data, if the probability of missing varies across the categories of interest as well as the small areas. We develop a double mixed modeling approach that combines a random effects mixed model for the underlying complete data with a random effects mixed model of the differential missing-data mechanism. The effect of sampling design can be incorporated through a quasi-likelihood sampling model. The associated conditional mean squared error of prediction is approximated in terms of a three-part decomposition, corresponding to a naive prediction variance, a positive correction that accounts for the hypothetical parameter estimation uncertainty based on the latent complete data, and another positive correction for the extra variation due to the missing data. We illustrate our approach with an application to the estimation of Municipality household compositions based on the Norwegian register household data, which suffer from informative under-registration of the dwelling identity number.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211042
    Description:

    This paper proposes an approach for small area prediction based on data obtained from periodic surveys and censuses. We apply our approach to obtain population predictions for the municipalities not sampled in the Brazilian annual Household Survey (PNAD), as well as to increase the precision of the design-based estimates obtained for the sampled municipalities. In addition to the data provided by the PNAD, we use census demographic data from 1991 and 2000, as well as a complete population count conducted in 1996. Hierarchically non-structured and spatially structured growth models that gain strength from all the sampled municipalities are proposed and compared.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211043
    Description:

    Business surveys often use a one-stage stratified simple random sampling without replacement design with some certainty strata. Although weight adjustment is typically applied for unit nonresponse, the variability due to nonresponse may be omitted in practice when estimating variances. This is problematic especially when there are certainty strata. We derive some variance estimators that are consistent when the number of sampled units in each weighting cell is large, using the jackknife, linearization, and modified jackknife methods. The derived variance estimators are first applied to empirical data from the Annual Capital Expenditures Survey conducted by the U.S. Census Bureau and are then examined in a simulation study.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211044
    Description:

    In large scaled sample surveys it is common practice to employ stratified multistage designs where units are selected using simple random sampling without replacement at each stage. Variance estimation for these types of designs can be quite cumbersome to implement, particularly for non-linear estimators. Various bootstrap methods for variance estimation have been proposed, but most of these are restricted to single-stage designs or two-stage cluster designs. An extension of the rescaled bootstrap method (Rao and Wu 1988) to stratified multistage designs is proposed which can easily be extended to any number of stages. The proposed method is suitable for a wide range of reweighting techniques, including the general class of calibration estimators. A Monte Carlo simulation study was conducted to examine the performance of the proposed multistage rescaled bootstrap variance estimator.

    Release date: 2009-12-23
Data (40)

Data (40) (30 to 40 of 40 results)

  • Table: 89-637-X2009005
    Geography: Province or territory
    Description:

    A series of supporting data tables accompanies the Métis analytical article from the 2006 Aboriginal Peoples Survey (APS). These tables provide data at the provincial/regional level for the Métis identity population (aged 15 and older) for some of the major themes covered in the analytical article, including: self rated health status; percentage diagnosed with arthritis/rheumatism, high blood pressure, stomach problems or intestinal ulcers, asthma and diabetes; having a regular family doctor; not receiving health care when needed and; reasons for not completing elementary or secondary school. For Métis children aged 6 to 14, tables include: self-rated health status; frequency of participation in sports and; contact with a pediatrician, general practitioner or family physician in the past 12 months.

    Release date: 2009-03-26

  • Table: 51-004-X2009001
    Description:

    This publication provides quarterly information on operational and financial variables related to the scheduled and charter operations of all Canadian-licensed air carriers classified into reporting levels I and II. Operational data (passengers, passenger-kilometres, goods carried, goods tonne-kilometres, etc.) and financial data (operating revenues, operating expenses, employment expenses) are presented. This publication also includes data highlights and some financial performance indicators and productivity measures.

    Release date: 2009-03-09

  • Table: 81-595-M2009073
    Geography: Canada
    Description:

    This bulletin presents the final set of tables which contain salary information for the year 2006/2007. This information is collected annually under the University and College Academic Staff System and has a reference date of October 1st. Therefore, the data reflect employment in universities as of that date. Each university must authorize Statistics Canada to release their information. However, information for institutions that have less than 100 full-time staff are not included.

    Release date: 2009-03-09

  • Table: 89-637-X2009002
    Geography: Canada
    Description:

    A series of supporting data tables accompanies the First Nations analytical article from the 2006 Aboriginal Peoples Survey (APS). These supporting data tables provide data at the provincial/regional level for off-reserve First Nations children aged 6 to 14 for major themes covered in the analytical article: school achievement; parental satisfaction toward school practices; getting along with teachers; learning disability; frequency of reading books; and frequency of playing sports.

    Release date: 2009-02-19

  • Table: 97-555-X
    Description: The tables in the topic 'Language' present data on the language composition of Canada, by mother tongue and other variables, as well as on languages spoken at home and knowledge of English, French and non-official languages. This topic also presents data on the language used most often at work, as well as on any other languages used at work on a regular basis, by mother tongue and other sociocultural characteristics.

    These data were collected for a 20% sample of the Canadian population. Only the data for mother tongue were collected for the entire population.

    Release date: 2009-01-22

  • Table: 97-555-X2006057
    Description:

    Language data for Canada, provinces, territories, census divisions and census subdivisions are shown in this table.

    This table is part of the topic 'Language,' which presents data on the language composition of Canada, by mother tongue and other variables, as well as on languages spoken at home and knowledge of English, French and non-official languages. This topic also presents data on the language used most often at work, as well as on any other languages used at work on a regular basis, by mother tongue and other sociocultural characteristics.

    These data were collected for a 20% sample of the Canadian population. Only the data for mother tongue were collected for the entire population.

    This table can be found in the DVD-ROM: Portrait of Official-language Communities in Canada, 2006 Census, Catalogue no. 92-592-XVB.

    This table is available free on the Internet, Catalogue no. 97-555-XWE2006057.

    Release date: 2009-01-22

  • Table: 97-555-X2006058
    Description:

    Language data for Canada, provinces, territories, census metropolitan areas and census agglomerations are shown in this table.

    This table is part of the topic 'Language,' which presents data on the language composition of Canada, by mother tongue and other variables, as well as on languages spoken at home and knowledge of English, French and non-official languages. This topic also presents data on the language used most often at work, as well as on any other languages used at work on a regular basis, by mother tongue and other sociocultural characteristics.

    These data were collected for a 20% sample of the Canadian population. Only the data for mother tongue were collected for the entire population.

    This table can be found in the DVD-ROM: Portrait of Official-language Communities in Canada, 2006 Census, Catalogue no. 92-592-XVB.

    This table is available free on the Internet, Catalogue no. 97-555-XWE2006058.

    Release date: 2009-01-22

  • Table: 97-555-X2006059
    Description:

    Language data for Canada, provinces, territories, census divisions and census subdivisions are shown in this table.

    This table is part of the topic 'Language,' which presents data on the language composition of Canada, by mother tongue and other variables, as well as on languages spoken at home and knowledge of English, French and non-official languages. This topic also presents data on the language used most often at work, as well as on any other languages used at work on a regular basis, by mother tongue and other sociocultural characteristics.

    These data were collected for a 20% sample of the Canadian population. Only the data for mother tongue were collected for the entire population.

    This table can be found in the DVD-ROM: Portrait of Official-language Communities in Canada, 2006 Census, Catalogue no. 92-592-XVB.

    This table is available free on the Internet, Catalogue no. 97-555-XWE2006059.

    Release date: 2009-01-22

  • Table: 97-555-X2006060
    Description:

    Language data for Canada, provinces, territories, census metropolitan areas and census agglomerations are shown in this table.

    This table is part of the topic 'Language,' which presents data on the language composition of Canada, by mother tongue and other variables, as well as on languages spoken at home and knowledge of English, French and non-official languages. This topic also presents data on the language used most often at work, as well as on any other languages used at work on a regular basis, by mother tongue and other sociocultural characteristics.

    These data were collected for a 20% sample of the Canadian population. Only the data for mother tongue were collected for the entire population.

    This table can be found in the DVD-ROM: Portrait of Official-language Communities in Canada, 2006 Census, Catalogue no. 92-592-XVB.

    This table is available free on the Internet, Catalogue no. 97-555-XWE2006060.

    Release date: 2009-01-22

  • Profile of a community or region: 89-635-X
    Description:

    The online product 2006 Profile of Aboriginal Children, Youth and Adults provides an extensive set of data about Aboriginal children, youth and adults (Métis, Inuit and off-reserve North American Indian) living in urban, rural and northern locations across Canada.

    Key indicators from the 2006 Aboriginal Children's Survey (ACS) and the 2006 Aboriginal Peoples Survey (APS) are presented as part of an interactive online tool and provide data on a wide range of topics, including: family and community; childcare; nurturing; healthy living; food and nutrition; languages; education; social activities; labour activity; income; communications technology; housing; and community wellness. These data can be used to better understand the social and living conditions of Aboriginal people.

    Data are presented for Aboriginal Peoples using the concepts of Aboriginal identity, Treaty Indian or Registered Indian status (as defined by the Indian Act of Canada) and Aboriginal ancestry.

    Release date: 2009-01-16
Analysis (302)

Analysis (302) (0 to 10 of 302 results)

  • Articles and reports: 13-604-M2009063
    Description:

    This paper highlights the Canadian Tourism Satellite Account (CTSA) developed by Statistics Canada. The CTSA provides an economic measure of the importance of tourism in terms of expenditures, Gross Domestic Product and employment for Canada. It permits a comparison of tourism with other industries within Canada since the concepts and methods used are based on the framework of the Canadian System of National Accounts. The study revealed that tourism is an important part of Canada's well diversified economy. This paper presents the results of the CTSA for reference year 2004.

    This study was prepared by staff of the Research and Development Projects and Analysis Section, Income and Expenditure Accounts Division, Statistics Canada. The study was funded by the Canadian Tourism Commission.

    Release date: 2009-12-24

  • Articles and reports: 12-001-X200900211036
    Description:

    Surveys are frequently required to produce estimates for subpopulations, sometimes for a single subpopulation and sometimes for several subpopulations in addition to the total population. When membership of a rare subpopulation (or domain) can be determined from the sampling frame, selecting the required domain sample size is relatively straightforward. In this case the main issue is the extent of oversampling to employ when survey estimates are required for several domains and for the total population. Sampling and oversampling rare domains whose members cannot be identified in advance present a major challenge. A variety of methods has been used in this situation. In addition to large-scale screening, these methods include disproportionate stratified sampling, two-phase sampling, the use of multiple frames, multiplicity sampling, panel surveys, and the use of multi-purpose surveys. This paper illustrates the application of these methods in a range of social surveys.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211037
    Description:

    Randomized response strategies, which have originally been developed as statistical methods to reduce nonresponse as well as untruthful answering, can also be applied in the field of statistical disclosure control for public use microdata files. In this paper a standardization of randomized response techniques for the estimation of proportions of identifying or sensitive attributes is presented. The statistical properties of the standardized estimator are derived for general probability sampling. In order to analyse the effect of different choices of the method's implicit "design parameters" on the performance of the estimator we have to include measures of privacy protection in our considerations. These yield variance-optimum design parameters given a certain level of privacy protection. To this end the variables have to be classified into different categories of sensitivity. A real-data example applies the technique in a survey on academic cheating behaviour.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211038
    Description:

    We examine overcoming the overestimation in using generalized weight share method (GWSM) caused by link nonresponse in indirect sampling. A few adjustment methods incorporating link nonresponse in using GWSM have been constructed for situations both with and without the availability of auxiliary variables. A simulation study on a longitudinal survey is presented using some of the adjustment methods we recommend. The simulation results show that these adjusted GWSMs perform well in reducing both estimation bias and variance. The advancement in bias reduction is significant.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211039
    Description:

    Propensity weighting is a procedure to adjust for unit nonresponse in surveys. A form of implementing this procedure consists of dividing the sampling weights by estimates of the probabilities that the sampled units respond to the survey. Typically, these estimates are obtained by fitting parametric models, such as logistic regression. The resulting adjusted estimators may become biased when the specified parametric models are incorrect. To avoid misspecifying such a model, we consider nonparametric estimation of the response probabilities by local polynomial regression. We study the asymptotic properties of the resulting estimator under quasi-randomization. The practical behavior of the proposed nonresponse adjustment approach is evaluated on NHANES data.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211040
    Description:

    In this paper a multivariate structural time series model is described that accounts for the panel design of the Dutch Labour Force Survey and is applied to estimate monthly unemployment rates. Compared to the generalized regression estimator, this approach results in a substantial increase of the accuracy due to a reduction of the standard error and the explicit modelling of the bias between the subsequent waves.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211041
    Description:

    Estimation of small area (or domain) compositions may suffer from informative missing data, if the probability of missing varies across the categories of interest as well as the small areas. We develop a double mixed modeling approach that combines a random effects mixed model for the underlying complete data with a random effects mixed model of the differential missing-data mechanism. The effect of sampling design can be incorporated through a quasi-likelihood sampling model. The associated conditional mean squared error of prediction is approximated in terms of a three-part decomposition, corresponding to a naive prediction variance, a positive correction that accounts for the hypothetical parameter estimation uncertainty based on the latent complete data, and another positive correction for the extra variation due to the missing data. We illustrate our approach with an application to the estimation of Municipality household compositions based on the Norwegian register household data, which suffer from informative under-registration of the dwelling identity number.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211042
    Description:

    This paper proposes an approach for small area prediction based on data obtained from periodic surveys and censuses. We apply our approach to obtain population predictions for the municipalities not sampled in the Brazilian annual Household Survey (PNAD), as well as to increase the precision of the design-based estimates obtained for the sampled municipalities. In addition to the data provided by the PNAD, we use census demographic data from 1991 and 2000, as well as a complete population count conducted in 1996. Hierarchically non-structured and spatially structured growth models that gain strength from all the sampled municipalities are proposed and compared.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211043
    Description:

    Business surveys often use a one-stage stratified simple random sampling without replacement design with some certainty strata. Although weight adjustment is typically applied for unit nonresponse, the variability due to nonresponse may be omitted in practice when estimating variances. This is problematic especially when there are certainty strata. We derive some variance estimators that are consistent when the number of sampled units in each weighting cell is large, using the jackknife, linearization, and modified jackknife methods. The derived variance estimators are first applied to empirical data from the Annual Capital Expenditures Survey conducted by the U.S. Census Bureau and are then examined in a simulation study.

    Release date: 2009-12-23

  • Articles and reports: 12-001-X200900211044
    Description:

    In large scaled sample surveys it is common practice to employ stratified multistage designs where units are selected using simple random sampling without replacement at each stage. Variance estimation for these types of designs can be quite cumbersome to implement, particularly for non-linear estimators. Various bootstrap methods for variance estimation have been proposed, but most of these are restricted to single-stage designs or two-stage cluster designs. An extension of the rescaled bootstrap method (Rao and Wu 1988) to stratified multistage designs is proposed which can easily be extended to any number of stages. The proposed method is suitable for a wide range of reweighting techniques, including the general class of calibration estimators. A Monte Carlo simulation study was conducted to examine the performance of the proposed multistage rescaled bootstrap variance estimator.

    Release date: 2009-12-23
Reference (17)

Reference (17) (0 to 10 of 17 results)

  • Surveys and statistical programs – Documentation: 82-230-X
    Description:

    This report presents the results of the 3rd Consensus Conference on Health Indicators that was convened in March 2009, including information that was presented at the conference, a summary of the consultation process leading up to the event, and the priority health areas deemed most important for future indicator development work.

    The conference marked the 10th anniversary of the Health Indicators project, a collaboration between Statistics Canada and Canadian Institute for Health Information (CIHI). The goal of the project is to provide health regions, health care providers and the public in general with reliable and comparable data on the health of Canadians and to assist stakeholders and decision makers in the use and interpretation of the indicator data.

    Release date: 2009-12-21

  • Surveys and statistical programs – Documentation: 62F0026M2009002
    Geography: Province or territory
    Description:

    This guide presents information of interest to users of data from the Survey of Household Spending, which gathers information on the spending habits, dwelling characteristics and household equipment of Canadian households. The survey covers private households in the 10 provinces. (The territories are surveyed every second year, starting in 1999.)

    This guide includes definitions of survey terms and variables, as well as descriptions of survey methodology and data quality. One section describes the various statistics that can be created using expenditure data (e.g., budget share, market share, aggregates and medians).

    Release date: 2009-12-18

  • Surveys and statistical programs – Documentation: 13-605-X200900211057
    Description:

    With the latest release of the bilateral Purchasing Power Parities estimates for Canada and the U.S., an improved projection methodology for the non-benchmark year has been employed. This note summarizes the new methodology and its rationale.

    Release date: 2009-12-10

  • Surveys and statistical programs – Documentation: 13-604-M2009062
    Description:

    Statistics Canada produces monthly import and export merchandise trade price indexes. For the majority of these prices, Statistics Canada uses a variety of proxy measures to derive the price index in lieu of collecting observed import and export prices. The ability of these proxy measures to reflect international trade price movements during times of exchange rate volatility is limited. For this reason, the constant dollar trade estimates derived using these proxy price indexes have been refined with constant dollar adjustments following the appreciation of the Canadian exchange rate beginning at the end of 2002. This paper explains the rational and methodology behind these adjustments, as well as the impact on published trade and GDP estimates.

    Release date: 2009-12-04

  • Surveys and statistical programs – Documentation: 89-634-X2009008
    Geography: Canada
    Description:

    The Strengths and Difficulties Questionnaire (SDQ) is a parent-reported instrument designed to provide information on children's behaviours and relationships. The SDQ consists of 25 items which are grouped into five subscales: (1) pro-social, (2) inattention-hyperactivity, (3) emotional symptoms, (4) conduct problems, and (5) peer problems. The SDQ was used to provide information on children aged 2 to 5 years in the 2006 Aboriginal Children's Survey (ACS). Though validated on general populations, the constructs of the SDQ have not been validated for off-reserve First Nations, Métis and Inuit children in Canada. The first objective of this evaluation is to examine if the five subscales of the SDQ demonstrate construct validity and reliability for off-reserve First Nations, Métis and Inuit children. The second objective is to examine if an alternative set of subscales, using the 25 SDQ items, may be more valid and reliable for off-reserve First Nations, Métis and Inuit children.

    Release date: 2009-11-25

  • Notices and consultations: 13-605-X200900111027
    Description:

    With the release of the Financial Flow Accounts (FFA) on December 1st and the National Balance Sheet Accounts (NBSA) on December 14th, the Income and Expenditure Accounts Division will be publishing revised sector and category detail on CANSIM.

    Release date: 2009-11-19

  • Surveys and statistical programs – Documentation: 92-568-X
    Description:

    This report describes sampling and weighting procedures used in the 2006 Census. It reviews the history of these procedures in Canadian censuses, provides operational and theoretical justifications for them, and presents the results of the evaluation studies of these procedures.

    Release date: 2009-08-11

  • Surveys and statistical programs – Documentation: 68F0023X
    Description:

    Government financial reports are based on the organisation of each individual government and on their accounting and reporting practices. There is therefore little uniformity from one level of government to another or from one province to another. The Financial Management System (FMS) is an analytical framework designed to produce statistical series that are both consistent and compatible.

    Written in plain English, the Financial Management System (FMS) manual was designed to assist you in better understanding the framework of the Financial Management System (FMS). It will explain the strengths and caveats of the FMS and will provide you with clear explanations of what is included in each revenue source and each expenditure function.

    Release date: 2009-07-27

  • Surveys and statistical programs – Documentation: 16-001-M2009008
    Description:

    In 2008, Statistics Canada conducted the first Agricultural Water Use Survey. This pilot survey is part of the Canadian Environment Sustainability Indicators initiative and collects information on volumes of water used for irrigation, irrigated areas, irrigation practices and the quality of water used for agricultural purposes. This technical paper describes the methodology used for the pilot survey and includes recommendations for future cycles of the survey. The validation process seems to indicate that the method used to estimate the volumes of water used and the irrigated areas calculated underestimates the results. The report gives recommendations to minimize this bias in the next iterations of the survey. First, it is recommended to simplify the level of information collected by the survey; to review the sampling methodology; and to examine other means of collecting information on volumes of water used for irrigation. This pilot version of the survey remains a reliable source for consistent data on agricultural water use.

    Release date: 2009-06-26

  • Surveys and statistical programs – Documentation: 16-001-M2009007
    Description: In this paper, we present the methodology developed by Statistics Canada to calculate the average annual water yield for Canada. Water yield, for the purposes of this paper, is defined as the amount of freshwater derived from unregulated flow (m3 s-1) measurements for a given geographic area over a defined period of time. The methodology is applied to the 1971 to 2000 time period.

    This research was conducted to fill data gaps in Statistics Canada's water statistics program. These gaps exist because estimates of freshwater flow for Canada have not been calculated regularly and have been produced using a variety of methods that do not necessarily generate comparable results. The methodology developed in this study produced results that are coherent through space and time. These results will be used in the future to investigate changes in water yield on a more disaggregated basis.

    To achieve the water yield estimate a database of natural streamflow observations from 1971 to 2000 was compiled. The streamflow values were then converted to a runoff depth and interpolated using ordinary kriging to produce spatial estimates of runoff. The spatial estimates were then scaled to create a National estimate of water yield as a thirty-year average. The methodology and results were then validated using a stability analysis and several techniques involving uncertainty. The result of the methodology indicates that the thirty-year average water yield for Canada is 3435 km3.

    Release date: 2009-06-01